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PRINTING P SS.

No. 592,563. Patented Oct 26, 1897.

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PATENT PRINTING-PRESS.

SPECIFICATION forming part of Letters Patent No. 592,563, dated October26, 1897.

Application filed July 8, I895. Renewed March Z9, 1897. Serial No.629,855. (No model.) i

To all whom it may concern;

Be it known that I, ABNER GREENLEAF, a citizen of the United States,residing at Baltimore city, in the State of Maryland, have inventedcertain new and useful Improvements in Printing-Presses; and I doherebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

The object of my invention is to overcome certain objections to theregistering devices as at present employed upon or in connection withthe impression-cylinder of printing and lithographic or similar presses,where great accuracy is required. IIeretofore such gages have eitherbeen attached to the frame and made to rest at the desired point upon orover the cylinder or they have been connected with the cylinder, butmade to withdraw from the registering-point while the impressions werebeing taken. In each case the result has been unsatisfactory and theregistering inaccurate.

My invention consists in separating the gage for the edge of the paperand the guide for the top of the paper attaching the gage for the edgeof the paper to the cylinder, making it adj ustable to and from thegripper-line, but when once set to remain fixed so as to move with thecylinder, but to have no independent movement in relation thereto, andin leaving the guides for the top of the paper fixed to the usual armsupported by the frame. It will thus be seen that the gage can nevervary in its relation to the cylinder, as there will be no lost motion,the gage and cylinder being practically integral.

The guide for directing the paper to the gage is left upon the arm, asis usual in such devices. I show but one arm with guide attached, andtherefore refer to such parts in the singular. Two or more guides will,however, be employed, as may be found necessary or convenient.

Referring to the accompanying drawings, forming a part of thisspecification, Figure 1 is a fragmentary perspective showing a part ofthe impression-cylinder and frame With my improvement attached. Fig. 2is an end view showing a side elevation of my improvement and afragmentary outline of a part of the cylinder. Fig. 3 is a fragmentaryperspective of the abutting gage-plate. Fig. at is a similar View of theguide for bringing the paper squarely against the abutting gage. Fig. 5is a fragmentary cross-section of the gageholder. Fig. 6 is afragmentary detail of the gage-plates, the lower one being slotted topermit of its adjustment and the upper plate being perforated toaccommodate the bindingscrew.

Referring to'the several parts by letters of reference, A indicates theframe; 0, the impression-cylinder; B, the gage-plate, against the bentend of which the paper abuts, the end extending up through an opening inthe end of the plate B. The plate or gage B passes from the opening inthe end of plate 13 to the holder H, in which it is secured by means ofa bindingscrew S. This screw passes through a slot which can be seen inFig. 6. This slot permits the plate B to slide in the holder and to beadjusted by means of a screw r. The plate B rests in the holder II abovethe gageplate B and is perforated so as to permit the screw S to passthrough it, which when forced down binds both the plates B B securely inthe holder. The holder H is secured in the gripper-recess of thecylinder by means of a rod in. It will thus be seen that the gage B is,when set, practically integral with the cylinder and has no movement ofits own and must therefore always remain the same, whether the stoppingof the cylinder is accurate or not. To obviate imparting a separatemovement to the gage, I place the guide D upon the arm E in the usualway. This arm may either be lifted to raise the guide after it hasperformed its function or the guide may be held at rest and have itsdownwardly-bent end cl recessed, as shown in Fig. 4, to permit thepassage of the gage. It will thus be seen that by securing the abuttinggage in a fixed position on the cylinder and leaving the guide attachedto the arm E a stop-gage is obtained that Will not be subject toinaccuracies from variations in the stopping of. the cylinder or theindependent movement of the gage.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

In a printing-press, a means for producing accurate registration, thesame consisting of an impression-cylinder provided with an abuttinggage, fixed 0n the cylinder and movable with it, in eombination'with aguide above the paper for directing the edge of the paper to the gage,said guide being independent of and not movable with the cylinder, asset forth.

, In testimony whereof I have affixed mysignature-in presence of twowitnesses.

v ABNER GREENL AF.

I Witnesses:

ROGER N. GULL, -A. F. CONNOLLY.

